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  • Airbox filter

    I'm just about to start my airbox install. I was wondering what the preferred method is of adding a filter these days?

    Thanks
    James


  • #2
    I simply use HVAC foam filter material. I sandwich it between two pieces of stainless steel mesh that give it rigidity (as well as protecting it from anything big and sharp) and then seal that to the airbox with good duct tape.

    I got that idea from Markus many years ago when I got my first airbox and have been doing it ever since.

    It comes in large sheets, I just trace the pattern of the flange on the snorkle and cut it out.
    Many people have gone through extraordinary efforts to make all kinds of elaborate filters for these things (K&N adapters, K&N snorkles, etc),,, but the sad truth of the matter is i would put money on the fact that the filter material, will never be the cause of the demise of your engine.
    jimmy p.
    87 E30 M3 Prodrive British Touring Car
    88 E30 M3 Zinnoberot - Street
    88 E30 M3 Lachsilber - Race (#98 SCCA SPU)
    92 E30 M Technic Cabrio - S14 POWERED!
    98 318Ti M44, Base - Morea Green
    04 Ford F350 - V10

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    • #3
      Thank you. I'll look into that. Do you have a link or any pictures?
      James

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      • #4
        I dont think I have any "in process" pictures. I'll look, I doubt it, I'm not a picture taker kind of guy.
        I can probably get sort of a pic of it in the car.

        The one I have been using for years is a foam WEB filters product, its 2 or 3 layers. I think this is it:

        http://www.webproducts.com/web-plus-filters.html
        jimmy p.
        87 E30 M3 Prodrive British Touring Car
        88 E30 M3 Zinnoberot - Street
        88 E30 M3 Lachsilber - Race (#98 SCCA SPU)
        92 E30 M Technic Cabrio - S14 POWERED!
        98 318Ti M44, Base - Morea Green
        04 Ford F350 - V10

        Comment


        • #5
          Cheers jimmy p,

          I found this after your advice, They have sent me a 400 x 800 sheet I can cut down.

          https://www.ebay.co.uk/itm/Ramair-Un...53.m1438.l2649


          James

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          • #6
            That looks perfect. Thats a good find. Get some metal mesh to make yourself a frame for it on both sides, then just seal that to the front of the inlet. I used duct tape on mine so I can take it off easily for service. I re-use the steel mesh "frame" and either clean or throw away the filter material.
            Last edited by jimmy p.; 09-11-2018, 02:08 PM.
            jimmy p.
            87 E30 M3 Prodrive British Touring Car
            88 E30 M3 Zinnoberot - Street
            88 E30 M3 Lachsilber - Race (#98 SCCA SPU)
            92 E30 M Technic Cabrio - S14 POWERED!
            98 318Ti M44, Base - Morea Green
            04 Ford F350 - V10

            Comment


            • #7
              Here’s what I did, nice and simple as you said. I just used some silicone sealer that can easily be removed when it needs changing. Unfortunately I only had clear as black would have been nicer.
              Still really pleased with the result. Click image for larger version

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              James

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